Earth Abundant Electrocatalysts for Oxygen Evolution

Currently, one of the most critical challenges facing sustainable energy conversion and storage technologies is the pursuit of low cost, highly active, and robust electrocatalysts towards oxygen evolution reaction (OER). To address this issue, tremendous research efforts have been devoted to exploiting earth-abundant electrocatalysts for OER, including transition metal compounds (metal or alloys, oxides, hydroxides, sulfides, selenides, nitrides, phosphides, and other compounds), heteroatom doped carbon nanomaterials, and their hybrids. In this chapter, we thoroughly summarize multiple evaluation criteria, reaction mechanisms, and practical applications of OER to provide a comprehensive understanding of earth-abundant OER electrocatalysts. Besides, some perspectives about the future development direction for rationally designing OER electrocatalysts are proposed.